Implantable injection port



FIG. 1 is a perspective view of the implantable injection port, showing my new design;

FIG. 2 is a side view thereof, the other side being a mirror image therof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for an implantable injection port, as shown and described. 